1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f6603fe13da3ca83e1a9c10a775b3bb43ed0600bdf1d3a1a51c78c3e7eb546. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e4d13f0-f6a7-4078-9493-0a5d4ab2c0bb.json and https://artists.proofprofile.net/proofs/artist/3e4d13f0-f6a7-4078-9493-0a5d4ab2c0bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd78c130bd459b55bc65d37f18485b7a5bb9aff4572facaab9b50b287de95e1f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daad411bce4645c12ea992b1eff68d0f57de9a7a4ea174804d08c80650cf5e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d226b55fdf4fe88cdb61f78f5bce024262691924b3bded937e83f1e1d6e8d0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e9755fc38b1408ad09053f06a57f7a6ba52b287ba1ff82d3e5976d36adfd3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d07cdc8de0267ca4c6c7377760ce04586c0b4cd0d12da4c7451ed0adbf01e82. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797e82dc10a52c6c7111d7051d51744ea243e573c2a1a0ac98bc8bd44764314e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd54b9c5a0ece28bfcd46d8c63ed0df28ab3723a64d58f2d54bb82195191cfb1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2ef230e57b9aa6a2b8dc89b42d6e69df4aac1791cd587fb89795fc1bf343cf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3852b7e055def2c8a64b41d267b69dee57d6ccc7385efe6656b089578e2923ab. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9f9506f063e230bc3237d82d373d356e449b145c337fe80198473e5c224a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6634c4ec9b9a77ae4f4f4a7c55b925cf93caccca4e93aea176d4906666e89c64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6728629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524ba38a5031d3443cf55af67b13360d2d5a155a46a68fbb206b82e1ac0606a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6704459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f942ed729b1fd68541da6b8163071aba5cb630412222d041ed726b354eaae4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6757218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d38159d0d8e9b6b9a545d5a65ba9d1f7bd00af00bab9fee5408ec842da8fa2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6779327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c689d58b146c71e99a3af3fcf899024fc91cbb31fe63f513ec64276111987. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF2500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4eae5afca9bd7c2bb6ac3b65ea699039ff7b430752a19bb9f915e78b00d88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF2515923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84764590e12603cab3f4955589bfe38c2fc68055440d99cab1d134f100f852c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF2527997.